Fig. 7. Comparison of the olfactory detection threshold values (expressed as vapour phase concentrations) of the squirrel monkeys and the pigtail macaques for aliphatic alcohols with those of other mammalian species. Human data are from Cometto-Muniz and Cain (1990) and Devos et al. (1990); animal data are from Laska (1990) and Passe and Walker (1985). Threshold is measured in parts per million.